diff --git a/features/sass_partials.feature b/features/sass_partials.feature
new file mode 100644
index 00000000..c3fcf0b0
--- /dev/null
+++ b/features/sass_partials.feature
@@ -0,0 +1,17 @@
+Feature: Sass Partials
+  Scenario: The preview server should update stylesheets when Sass partials change
+  Given the Server is running at "preview-app"
+    And the file "source/stylesheets/_partial.sass" has the contents
+      """
+      body
+        font-size: 14px
+      """
+    When I go to "/stylesheets/main.css"
+    Then I should see "font-size: 14px"
+    And the file "source/stylesheets/_partial.sass" has the contents
+      """
+      body
+        font-size: 18px
+      """
+    When I go to "/stylesheets/main.css"
+    Then I should see "font-size: 18px"
\ No newline at end of file
diff --git a/fixtures/preview-app/source/stylesheets/_partial.sass b/fixtures/preview-app/source/stylesheets/_partial.sass
new file mode 100644
index 00000000..3b0e67db
--- /dev/null
+++ b/fixtures/preview-app/source/stylesheets/_partial.sass
@@ -0,0 +1,2 @@
+body
+  font-size: 18px
\ No newline at end of file
diff --git a/fixtures/preview-app/source/stylesheets/main.css.sass b/fixtures/preview-app/source/stylesheets/main.css.sass
new file mode 100644
index 00000000..b7c61042
--- /dev/null
+++ b/fixtures/preview-app/source/stylesheets/main.css.sass
@@ -0,0 +1 @@
+@import partial.sass
\ No newline at end of file